Three-phase cylinder-penetrating busbar injection molding assembly

Abstract

The utility model discloses a kind of three-phase cylinder-penetrating Busbar injection molding components, and the technical problem to be solved is: how to improve the sealing effect to cylinder, prevent gas and moisture into cylinder. Three-phase cylinder-penetrating Busbar injection molding components include the injection molding main body with middle island structure and installation structure, through the injection molding main body and middle island structure and be provided with pin, middle island structure is connected with the sealing ring for sealing, the one end of injection molding main body away from middle island structure is provided with the main body hole groove for glue pouring. Sealing ring realizes and is closely combined with cylinder, directly blocks oil, gas and moisture infiltration, solves core sealing pain point;Main body hole groove provides accommodating space for glue pouring, sealing ring+glue pouring double protection sealing reliability;Middle island structure provides stable installation basis for sealing ring, avoids sealing component displacement. The technical scheme provided by the utility model sealing performance is significantly improved, structure stability is strong, assembly and use are convenient, and adaptability is high.

Description

Technical Field

[0001] This utility model relates to the technical field of low-voltage electrical connectors, and in particular to a three-phase through-cylinder busbar injection molding assembly. Background Technology

[0002] In the drive integration of electric new energy vehicles, the three-phase interface assembly is fixed to the cylinder block. Electrical components inside and outside the cylinder block are connected via pins on the three-phase interface assembly to achieve signal transmission between the inside and outside of the cylinder. As the interface connecting the inside and outside of the cylinder, it is divided into a dry end and a wet end. The dry end extends a plug to connect to electrical components or wiring harnesses. The wet end is in an oily and high-temperature environment, requiring high standards for materials and sealing performance; otherwise, corrosion and oil leakage may occur. To prevent oil leakage and ensure the long-term, stable operation of the electronic control devices, thereby extending their service life, it is necessary to develop a three-phase interface assembly with excellent sealing performance to improve the sealing effect on the cylinder block and prevent gas and moisture from entering the cylinder, thus solving the aforementioned problems.

[0003] It should be noted that the above technical information is the result of analysis and creative research. The detailed description of it in the background section is only intended to deepen the understanding of the overall background technology and non-obviousness of this utility model, and should not be regarded as an admission or implication in any form that the above technical information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] To address the shortcomings in the aforementioned background technology, this utility model proposes a three-phase cylinder busbar injection molding assembly. The technical problem to be solved is: how to improve the sealing effect on the cylinder body and prevent gas and moisture from entering the cylinder body.

[0005] The technical solution of this utility model is as follows: A three-phase through-cylinder busbar injection molding assembly includes an injection-molded body with a central island structure and a mounting structure. A pin is inserted through the injection-molded body and the central island structure. A sealing ring is connected to the central island structure for sealing. A main body groove for dispensing adhesive is provided at the end of the injection-molded body opposite to the central island structure. The sealing ring achieves a tight fit with the cylinder body, directly preventing the infiltration of oil, gas, and moisture, thus solving the core sealing problem. The main body groove provides space for dispensing adhesive, and the sealing ring and dispensing adhesive provide dual protection for sealing reliability. The central island structure provides a stable mounting base for the sealing ring, preventing displacement of the sealing components.

[0006] Based on the above technical solutions, as a preferred technical solution for the three-phase through-cylinder Busbar injection molding assembly, the mounting structure includes circular through holes located on both sides of the central island structure, with open metal rings fitted into the circular through holes. The open metal rings accommodate the installation requirements of the circular through holes, and the opening design provides the metal rings with elasticity, reducing assembly difficulty and improving installation efficiency; the metal rings also enhance the rigidity of the mounting structure, preventing deformation of the through holes in the injection molding body due to long-term use and ensuring the structural stability after assembly.

[0007] Based on the above technical solutions, as a preferred technical solution for the three-phase through-cylinder busbar injection molding assembly, when the metal ring is assembled with the circular through hole, the opening is reduced and the outer circumferential surface fits against the inner wall of the circular through hole. After the opening is reduced, it fits tightly against the inner wall of the through hole, eliminating assembly gaps, improving the holding force after installation, and preventing the metal ring from loosening or shifting; the tight fit structure enhances the sealing of the mounting surface, indirectly helping to prevent impurities from seeping in from the installation gaps, thus supplementing the sealing effect.

[0008] Based on the above technical solutions, as a preferred technical solution for the three-phase through-cylinder Busbar injection molding assembly, both the upper and lower ends of the metal ring are provided with metal ring chamfers. The chamfer structure reduces the assembly friction resistance between the metal ring and the through hole, enabling fast and accurate assembly, reducing the risk of structural damage during the assembly process; it also prevents sharp edges from scratching the inner wall of the through hole of the injection molding body or the mounting contact surface, protecting the appearance and structural integrity of the assembly, and extending its service life.

[0009] Based on the above technical solutions, as a preferred technical solution for the three-phase through-cylinder Busbar injection molding assembly, the two ends of the injection molding body are smoothly transitioned wedge-shaped structures, and circular through holes for the mounting structure are provided at the wedge-shaped structures. The wedge-shaped structure adapts to the shape requirements of the cylinder mounting space, improving the adaptability of the assembly to the installation environment; the smooth transition design disperses stress concentration during installation, preventing the injection molding body from cracking due to uneven stress; the through holes located at the wedge shape optimize the distribution of installation stress points and improve the overall stability after assembly.

[0010] Based on the above technical solutions, as a preferred technical solution for the three-phase through-cylinder busbar injection molding assembly, the three busbars are vertically inserted through the injection molding body and centrally located in the island structure with equal spacing. The vertical arrangement ensures the accuracy of the pins' connection to external components, reduces contact problems, and guarantees stable transmission of three-phase electrical signals; the equal spacing avoids interference between pins, reduces the risk of short circuits, and facilitates the layout of wiring harnesses or mating components, improving ease of use.

[0011] Based on the above technical solutions, as a preferred technical solution for the three-phase through-cylinder Busbar injection molding assembly, the island structure includes an anti-detachment rib located at the free end, a sealing ring mounting surface located in the middle, and a boss that fits against the injection molding body. The anti-detachment rib directly prevents the sealing ring from detaching from the mounting surface, solving the sealing failure problem caused by sealing ring displacement; the sealing ring mounting surface ensures a tight fit of the sealing ring, increasing the sealing contact area; the boss provides support for the sealing ring, preventing excessive deformation of the sealing ring under pressure, extending the service life of the sealing ring, and the three elements work together to enhance sealing stability.

[0012] Based on the above technical solutions, as a preferred technical solution for the three-phase through-cylinder Busbar injection molding assembly, the projected area of ​​the main body slot is larger than the cross-sectional area of ​​the central island structure. A larger projected area can accommodate more two-component adhesive, ensuring complete coverage of the junction between the insert pin and the injection molding body, eliminating sealing dead zones; sufficient adhesive volume enhances the sealing strength after curing, ensuring a long-lasting sealing effect and contributing to achieving IPX-level sealing standards.

[0013] Based on the above technical solutions, as a preferred technical solution for the three-phase through-cylinder Busbar injection molding assembly, wedge-shaped barbs are provided on both the left and right sides of the middle part of the pin, and the barbs on the left and right sides of the pin are arranged symmetrically with respect to the center of the pin. The wedge-shaped barbs enhance the mechanical engagement force between the pin and the injection molding body, preventing the pin from detaching from the injection molding body due to vibration, pulling, etc., and improving the reliability of the structural connection; the symmetrical arrangement ensures that the pin is subjected to balanced force, avoiding tilting or deformation caused by unilateral force, and ensuring the stability of signal transmission.

[0014] Based on the above technical solutions, as a preferred technical solution for the three-phase through-cylinder Busbar injection molding assembly, both ends of the pin are provided with pin chamfers. The chamfer structure reduces the mating resistance between the pin and the external wiring harness and mating socket, enabling quick insertion and removal, improving assembly and usage efficiency; it also prevents the sharp ends of the pin from scratching the mating parts or operators, while protecting the end structure of the pin itself, reducing wear, and extending the service life of the assembly.

[0015] This utility model comprehensively solves the sealing problem of cylinder block through-cylinder connections through a multi-structure collaborative design, while also taking into account ease of assembly and structural stability. Its core advantages are as follows: 1. Significantly Improved Sealing Performance: Through dual protection of a sealing ring and potting compound, combined with an anti-detachment and support structure for the sealing ring, an IPX7 sealing effect is achieved. This effectively prevents oil, gas, and moisture from seeping into the cylinder, avoiding corrosion and malfunction of electronic control components and extending their service life. The assembly features a sealing ring that ensures a tight fit with the mating cylinder to prevent oil leakage. The top of the injection-molded main body's island section has an anti-detachment rib structure to prevent the sealing ring from detaching from the injection-molded main body. A step between the injection-molded main body and the mounting surface provides support for the sealing ring, ensuring it does not detach after installation. A groove structure at the junction of the injection-molded main body and the pin accommodates the two-component adhesive, which, after solidification, seals the busbar, achieving an IPX7 sealing effect.

[0016] 2. Strong structural stability: The anti-detachment ribs, barbs, and metal ring reinforcement structures ensure the connection of the sealing ring, pins, and mounting structure, preventing component displacement, loosening, or deformation, and adapting to the complex working conditions such as vibration and high temperature in new energy vehicle drive integration.

[0017] 3. Easy assembly and use: Two through-hole structures are symmetrically arranged on both sides of the injection-molded body, with two metal rings inside. The elastic opening and chamfer design of the metal rings, the chamfer and symmetrical arrangement of the pins, and the wedge-shaped structure of the injection-molded body all reduce assembly resistance, improve docking accuracy, and balance installation efficiency and operational safety.

[0018] 4. High adaptability: The wedge structure and equally spaced pin layout are designed to adapt to cylinder installation space and three-phase power transmission requirements. It has strong versatility and can be widely used in cylinder connection scenarios for low-voltage electrical connectors. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 Isometric view of a three-phase through-cylinder busbar injection molded assembly; Figure 2 Cross-sectional view of a three-phase through-cylinder busbar injection-molded assembly; Figure 3 Side view of a three-phase through-cylinder busbar injection-molded assembly without seals; Figure 4 Axonometric view of a three-phase through-cylinder busbar injection-molded assembly without seals; Figure 5 Axonometric drawing of a metal ring; Figure 6 : The main view of the pin.

[0021] Explanation of reference numerals in the attached figures: Injection molding body 1; 12. Mid-island structure; 121. Anti-detachment rib; 122. Sealing ring mounting surface; 123. Boss; Pin 2; 21. Barbed structure; 22. Chamfered pin. Wedge-shaped structure 131, circular through hole 132, main body groove 133; Sealing ring 3; Metal ring 4; 41. Outer circumference, 42. Opening, 43. Chamfer on metal ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the core concept of the present utility model and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0024] It should be noted that, in the description of this application, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] Furthermore, the terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0026] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0027] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0029] This embodiment provides a three-phase through-cylinder Busbar injection molding assembly to solve the sealing problem of through-cylinder connection and prevent gas and moisture from entering the cylinder.

[0030] Specific implementation methods are as follows Figure 1 and Figure 4 As shown, the injection body 1 includes a central island structure 12 and an installation structure. A pin 2 is provided through the injection body 1 and the central island structure 12. A sealing ring 3 for sealing is connected to the central island structure 12. A body groove 133 for dispensing glue is provided at the end of the injection body 1 away from the central island structure 12.

[0031] The sealing ring 3 fits tightly with the cylinder body, directly blocking the infiltration of oil, gas and moisture, thus solving the core sealing problem; the main hole groove 133 provides space for potting, and the sealing ring and potting provide double protection for sealing reliability; the central island structure 12 not only provides a stable installation base for the sealing ring 3, but also provides more support for the pin 2, which not only prevents the sealing components from shifting, but also ensures the strength of the structure.

[0032] Preferably, such as Figure 2As shown, the injection-molded body 1 is integrally formed, with a central island structure 12 and an installation structure; three pins 2 penetrate the injection-molded body 1 and the central island structure 12 along the axial direction; an O-ring seal 3 is fitted around the outer periphery of the central island structure 12; an annular body groove 133 is opened at the end of the injection-molded body 1 away from the central island.

[0033] Implementation effect: The sealing ring 3 fits tightly with the cylinder body, preventing external oil and gas from entering; after the main body groove 133 is filled with glue, the gap between the sealing pin and the injection molded body is sealed, and the core sealing problem is solved by double sealing.

[0034] Based on the above embodiments, as a preferred embodiment of the three-phase through-cylinder busbar injection molding assembly, such as... Figure 5 As shown, the mounting structure includes circular through holes 132 located on both sides of the central island structure 12, and the circular through holes 132 are fitted with metal rings 4 with openings 42.

[0035] The metal ring 4 with an opening is adapted to the installation requirements of the circular through hole 132. The opening 42 design gives the metal ring elasticity, reduces assembly difficulty, and improves installation efficiency. The metal ring 4 enhances the rigidity of the installation structure, prevents the through hole of the injection molded body from deforming due to long-term use, and ensures the structural stability after assembly.

[0036] Preferably, a circular through hole 132 is opened on each of the injection-molded bodies on the left and right sides of the central island structure 12, and the inner diameter of the through hole is adapted to the outer diameter of the metal ring 4; the metal ring 4 is a ring structure with an opening 42 opened along the axial direction, and the opening width is 1 / 10 to 1 / 8 of the circumference of the metal ring.

[0037] Implementation results: During installation, the metal ring 4 is easily inserted into the through hole through the contraction of the opening 42, making assembly convenient; the metal ring 4 enhances the structural strength of the through hole, avoids deformation over long-term use, and ensures the installation retention force.

[0038] Based on the above embodiments, as a preferred embodiment of the three-phase through-cylinder Busbar injection molding assembly, when the metal ring 4 is assembled with the circular through hole 132, the opening 42 is reduced and the outer peripheral surface 41 is in contact with the inner wall of the circular through hole 132.

[0039] After the opening is reduced, it fits tightly against the inner wall of the through hole, eliminating assembly gaps, improving the holding force after installation, and preventing the metal ring from loosening or shifting; the tight fit structure enhances the sealing of the mounting surface, indirectly helping to prevent impurities from seeping in from the installation gaps, thus supplementing the sealing effect.

[0040] Preferably, the outer diameter of the metal ring 4 in its natural state is slightly larger than the inner diameter of the circular through hole 132. When axial pressure is applied during assembly, the opening 42 tends to shrink to close, and the outer circumferential surface 41 of the metal ring 4 is completely fitted with the inner wall of the through hole without gaps.

[0041] Implementation effect: The fit structure eliminates installation gaps, and the metal ring 4 forms a stable connection with the through hole, preventing loosening and reducing the risk of impurities seeping in from the gaps.

[0042] Based on the above embodiments, as a preferred embodiment of the three-phase through-cylinder busbar injection molding assembly, such as... Figure 5 As shown, both the upper and lower ends of the metal ring 4 are provided with metal ring chamfers 43.

[0043] The chamfered structure reduces the frictional resistance between the metal ring and the through hole during assembly, enabling fast and precise assembly and reducing the risk of structural damage during the assembly process; it also prevents sharp edges from scratching the inner wall of the injection-molded body through hole or the mounting contact surface, protecting the appearance and structural integrity of the component and extending its service life.

[0044] Preferably, the inner and outer edges of both ends of the metal ring 4 are provided with a 45° chamfer 43, the chamfer width is 0.5~1mm, and the edges are free of burrs.

[0045] Implementation results: During assembly, the chamfered guide metal ring 4 smoothly enters the through hole, avoiding scratches on the inner wall of the through hole by the edge; during disassembly, it can also reduce damage to the injection molded body and improve the maintainability of the component.

[0046] Based on the above embodiments, as a preferred embodiment of the three-phase through-cylinder Busbar injection molding assembly, the two ends of the injection molding body 1 are smoothly transitioned wedge-shaped structures 131, and the circular through holes 132 of the mounting structure are provided at the wedge-shaped structures 131.

[0047] The wedge-shaped structure adapts to the shape requirements of the cylinder block installation space, improving the compatibility of the components with the installation environment; the smooth transition design disperses stress concentration during installation, preventing the injection-molded body from cracking due to uneven stress; the through hole is located at the wedge shape, optimizing the distribution of installation stress points and improving the overall stability after assembly.

[0048] Preferably, the two ends of the injection molding body 1 gradually narrow outward to form a wedge-shaped structure 131 with a wedge angle of 30°~45° and a smooth surface without sharp edges; a circular through hole 132 is opened in the middle of the wedge-shaped structure, and the axis of the through hole is parallel to the axis of the injection molding body.

[0049] Implementation results: The wedge-shaped structure fits the narrow space of the cylinder mounting cavity, facilitating quick positioning and installation of components; the smooth surface disperses installation stress, preventing cracking of the injection molded body.

[0050] Based on the above embodiments, as a preferred embodiment of the three-phase through-cylinder busbar injection molding assembly, such as... Figure 2 As shown, the three car vibrations 2 all penetrate vertically through the injection-molded main body 1 and are centered on the central island structure 12 and distributed at equal intervals.

[0051] Vertical arrangement ensures the accuracy of pin connection with external devices, reduces poor contact problems, and ensures stable transmission of three-phase electrical signals; equidistant distribution avoids interference between pins, reduces the risk of short circuits, and facilitates the layout of wiring harnesses or mating devices, improving ease of use.

[0052] Preferably, all three pins 2 are perpendicular to the mounting surface of the injection-molded body 1 and penetrate the central area of ​​the island structure 12; the center-to-center distance between adjacent pins 2 is 5~10mm, the outer diameter of the pins 2 is consistent, and the surface is tin-plated for oxidation resistance.

[0053] Implementation results: Vertical arrangement ensures accurate connection with external wiring harnesses, equidistant distribution avoids signal interference between pins, and tin plating improves conductivity and corrosion resistance, ensuring stable three-phase power transmission.

[0054] Based on the above embodiments, as a preferred embodiment of the three-phase through-cylinder busbar injection molding assembly, such as... Figure 3 As shown, the island structure 12 includes an anti-detachment rib 121 located at the free end, a sealing ring mounting surface 122 located in the middle, and a boss 123 that fits against the injection molding body 1.

[0055] The anti-detachment rib directly prevents the sealing ring from coming off the mounting surface, solving the problem of sealing failure caused by sealing ring displacement; the sealing ring mounting surface ensures that the sealing ring fits tightly, increasing the sealing contact area; the boss provides support for the sealing ring, preventing excessive deformation of the sealing ring under pressure, and extending the service life of the sealing ring. The three work together to enhance sealing stability.

[0056] Preferably, the anti-detachment rib 121 is an annular protrusion at the free end of the island structure 12, with a height of 2~3mm; the sealing ring mounting surface 122 is a smooth cylindrical surface, with its diameter interfering with the inner diameter of the sealing ring 3; the boss 123 is an annular step at the connection between the island structure and the injection molding body, with a width of 2~3mm.

[0057] Implementation effect: Anti-detachment rib 121 prevents the sealing ring 3 from axially dislodging, the mounting surface ensures the sealing ring fits tightly, and the boss 123 supports the sealing ring to avoid excessive compression. The three work together to ensure the stable installation of the sealing ring and the long-lasting sealing effect.

[0058] Based on the above embodiments, as a preferred embodiment of the three-phase through-cylinder Busbar injection molding assembly, the projected area of ​​the main body slot 133 is larger than the cross-sectional area of ​​the central island structure 12.

[0059] A larger projection area can accommodate more two-component adhesive, ensuring that the adhesive completely covers the junction between the pin and the injection body, eliminating sealing dead spots; sufficient amount of adhesive improves the sealing strength after curing, ensuring long-lasting sealing effect and helping to achieve the IPX7 sealing standard.

[0060] Preferably, the main hole groove 133 is a rectangular groove with an outer diameter 5-8 mm larger than the maximum cross-sectional diameter of the central island structure 12, a groove depth of 3-5 mm, and a flat bottom free of impurities.

[0061] Implementation results: The larger projection area can accommodate sufficient two-component adhesive, and after the adhesive is poured, it completely covers the junction between the pin and the injection-molded body. After curing, it forms a complete sealing layer that meets the IPX7 sealing standard.

[0062] Based on the above embodiments, as a preferred embodiment of the three-phase through-cylinder busbar injection molding assembly, such as... Figure 6 As shown, wedge-shaped barb structures 21 are provided on both the left and right sides of the middle part of the needle 2, and the barb structures 21 on the left and right sides of the needle 2 are arranged in a centrally symmetrical manner with respect to the center of the needle 2.

[0063] Wedge-shaped barbs enhance the mechanical engagement between the pin and the injection-molded body, preventing the pin from detaching from the injection-molded body due to vibration, pulling, etc., and improving the reliability of the structural connection; the centrally symmetrical arrangement ensures that the pin is subjected to balanced force, avoiding tilting or deformation caused by unilateral force, and ensuring the stability of signal transmission.

[0064] Preferably, the barb structure 21 is a wedge-shaped protrusion with a height of 0.8~1.2mm and an inclined direction towards the middle of the insert pin; the barbs on the left and right sides face opposite directions to prevent the insert pin 2 from coming out vertically after injection molding.

[0065] Implementation effect: The barbs form a mechanical engagement with the plastic of the injection-molded body, enhancing the pull-out force of the pins, preventing the pins from detaching due to vibration or pulling, and improving the structural stability of the component.

[0066] Based on the above embodiments, as a preferred embodiment of the three-phase cylinder busbar injection molding assembly, both ends of the insert pin 2 are provided with insert pin chamfers 22.

[0067] The chamfered structure reduces the mating resistance between the pins and external wiring harnesses and mating sockets, enabling quick insertion and removal and improving assembly and usage efficiency; it also prevents the sharp ends of the pins from scratching the mating parts or operators, while protecting the pin's own end structure, reducing wear, and extending the component's service life.

[0068] Preferably, the end face edges of the pin 2 are provided with a 30°~45° chamfer 22, the chamfer length is 1~2mm, and the surface is smooth and burr-free.

[0069] Implementation effect: During docking, the chamfered guide pins are quickly inserted into external sockets or wire harnesses, reducing insertion and removal resistance; sharp edges prevent scratching docking parts or operators, improving safety during use.

[0070] As a preferred embodiment. Based on the above technical background, this utility model provides an integral injection-molded through-cylinder busbar assembly with a sealing ring 3 and sealant. The assembly uses an overmolding injection molding process to arrange three busbars at equal intervals; both ends of the assembly have through holes of equal diameter, and two metal rings 4 are internally installed. A sealing ring 3 is fitted onto the injection-molded body 1. A main body groove 133 is provided at the junction of the mounting surface and the pin, and is filled with two-component adhesive.

[0071] The injection body 1 is made of engineering plastic that is resistant to high and low temperatures and oil. Its overall structure includes the central island structure 12 and the mounting structures on both sides. The two ends are designed as wedge-shaped structures 131 with smooth transitions to adapt to the spatial layout of the cylinder mounting position.

[0072] The central island structure 12 extends outward from the middle of the injection molding body 1, and is provided with a free end anti-detachment rib 121, a middle sealing ring mounting surface 122, and a boss 123 that fits against the injection molding body 1 in sequence. The sealing ring 3 is fitted onto the sealing ring mounting surface 122. The anti-detachment rib 121 prevents the sealing ring 3 from falling out, and the boss 123 provides support for the sealing ring 3.

[0073] A circular through hole 132 is opened at each of the wedge-shaped structures 131 on both sides of the injection body 1. A metal ring 4 with an opening 42 is installed in the through hole. The upper and lower ends of the metal ring 4 are provided with metal ring chamfers 43. During assembly, the opening 42 shrinks and the outer peripheral surface 41 fits tightly with the inner wall of the circular through hole 132.

[0074] Three pins 2 penetrate vertically through the injection-molded body 1 and the central island structure 12, and are distributed at equal intervals in the center of the central island structure 12. The left and right sides of the center of the pins 2 are provided with centrally symmetrical wedge-shaped barbs 21, and the perimeter of both ends is provided with pin chamfers 22.

[0075] The injection body 1 has a main body groove 133 at one end away from the central island structure 12. Its projected area is larger than the cross-sectional area of ​​the central island structure 12. After assembly, a two-component adhesive is injected into the main body groove 133. After curing, the joint between the pin 2 and the injection body 1 is sealed.

[0076] During assembly, the components are fixed to the cylinder mounting holes via the metal rings 4 on both sides, and the sealing ring 3 is tightly fitted to the cylinder mounting surface. After the adhesive is injected and cured, the components form a double sealing structure of "sealing ring sealing + cylinder contact surface adhesive sealing", which effectively prevents oil, gas and moisture from entering the cylinder and ensures the stable operation of the electronic control devices.

[0077] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0078] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A three-phase through-cylinder busbar injection molding assembly, characterized in that: The injection body (1) includes a central island structure (12) and an installation structure. A pin (2) is provided through the injection body (1) and the central island structure (12). A sealing ring (3) for sealing is connected to the central island structure (12). A body groove (133) for dispensing glue is provided at one end of the injection body (1) away from the central island structure (12).

2. The three-phase through-cylinder busbar injection molding assembly according to claim 1, characterized in that: The mounting structure includes circular through holes (132) on both sides of the central island structure (12), and the circular through holes (132) are fitted with metal rings (4) with openings (42).

3. The three-phase through-cylinder busbar injection molding assembly according to claim 2, characterized in that: When the metal ring (4) is assembled with the circular through hole (132), the opening (42) is reduced and the outer peripheral surface (41) is in contact with the inner wall of the circular through hole (132).

4. The three-phase through-cylinder busbar injection molding assembly according to claim 2 or 3, characterized in that: The metal ring (4) has metal ring chamfers (43) at both the upper and lower ends.

5. The three-phase through-cylinder busbar injection molding assembly according to claim 4, characterized in that: The two ends of the injection molding body (1) are wedge-shaped structures (131) with smooth transitions, and the circular through holes (132) of the mounting structure are provided at the wedge-shaped structures (131).

6. The three-phase through-cylinder busbar injection molding assembly according to any one of claims 1-3 and 5, characterized in that: The three pins (2) all penetrate vertically through the injection molding body (1) and are centered on the island structure (12) and distributed at equal intervals.

7. The three-phase through-cylinder busbar injection molding assembly according to claim 6, characterized in that: The central island structure (12) includes an anti-detachment rib (121) located at the free end, a sealing ring mounting surface (122) located in the middle, and a boss (123) that fits against the injection molding body (1).

8. The three-phase through-cylinder busbar injection molding assembly according to claim 7, characterized in that: The projected area of ​​the main hole (133) is greater than the cross-sectional area of ​​the central island structure (12).

9. The three-phase through-cylinder busbar injection molding assembly according to any one of claims 1-3, 5, 7-8, characterized in that: The left and right sides of the middle part of the needle (2) are provided with wedge-shaped barb structures (21), and the barb structures (21) on the left and right sides of the needle (2) are arranged in a centrally symmetrical manner with respect to the center of the needle (2).

10. The three-phase through-cylinder busbar injection molding assembly according to claim 9, characterized in that: The pin (2) has pin chamfers (22) around both ends.

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